Abstract

We discuss how to apply the Gaussian process model (GPM), also known as “Kriging, ” to the optimization of the optical response of metallic nanostructures. The optical response is calculated with the finite-difference time-domain method, and GPM allows one to locate maxima of the response in a multidimensional system parameter space. A pattern search method is used to validate and slightly improve upon the maxima that we locate. The optical response investigated, the near-field intensity enhancement above a periodic metallic slit structure, is found to be a complicated function consisting of several ridges that make it a very challenging optimization problem. A simple physical analysis is also presented to explain the origins of the system response structure.

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>> I guess, because photons from light are used to explain linear quality of optics, yet were they of typical material properties, there would be instant jam, all space would be like a photons-for-pool-balls first break

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